Level.



Aspiicatin sie@ November `r. i914, segni No. 872,517.

To all ywhom t may concern:

Be it known that I. Joni* BARTHA, a subject ol the King of Hungary, and .resident of Clinton. in the county of lvoicesterjand State of Massachusetts, have,l invented' new and useful Improvements in Levels, of which the following is a specification.

My invention relates to levels and has as its principal object. to provide an instrunient of -this kind which, instead of having `two separate indicators for horizontal and for perpendicular surfaces, has yonly one y suitable for both.

struction, combination and arrangement et,

parts as hereinafter more specifically dei scribed and illustrated in the accompanying' drawings. wherein is shown an embodiment of the invention, but it is to be understood.

that changes. variations and modifications can be resorted to which .come within the scope of the claim hereunto appended.

In the accompanying drawing: Figure l is a front view of the instrument with parts broken away and some hidden parts shown in dotted' lilies. Fig. 2 is a top view of the saine. Fig l3 is a section on -the line 3-3, Fig. 1,1ooliing in the direction of the arrows. Similar reference characters are-applied to similar parts throughout the dierent views.

Referring more particularly to the drawing, 4 is a level stock, having in its longitudinal center a circular hole which divides it into two separate pieces, the same being secured together on the top and bottoni edges by metal plates 5 and G, respectively, each being provided at its longitudinal center with an ovalopening or slot 7. The edges of the circular hole made in the level stock are beveled on each side and-a concave groove is formed in the center of the edge,

i n v l preferably lined with a metal ring lo. an

faces ot' the coverings l2 are provided v,

annular glass tube 8 is inserted into the hele made in the level stock, its outer circumference being partly embraced by the meti-ii ring lo. The glass .tube has a pro]ectiain 9 radially verging inward, ,formed thereon5 through which it may be filled with liquid it at one part of its circumference ac'coinino i dating` the. projection 9. Oneach 'side et the disk shaped member i3 are provided metal coverings 12 having a circular part lying on the side surf ce of the dish shaped. member 13, but of a somewhat larger dialin eter than the latter so as to reach close to the glass tube and then. bent downward-ly and inwardly, following the plane ,of the in ner periphery oi' the glass tube and ly' ig closely against it'.` The edges' oi the coer ings l2 meet at the central line of the ein cunierential edge of the disleshaped inei bei' 13. n

Brackets lei secured with one end to tirs level stoel; and with the. other end to tl disk shaped ineinber i3` through the niet coverings l2, hold the elements of this con- .struction securely in place. The top sur L-li graduations from l. to- Q contiguously te the glass tube 8 which graduations may be 'continued over the glass tube itself as shown at 1G.

In assembling the device7 the two separate parts of lthe level stock areplaced so as to embrace one end each of the glass tube and then united by the metal plates 5 and 6. The disk shaped member '13 is then placed vwithin the glass tube and the coverings l2 applied to it on either side.

Having thus described my invention., what claiin is: l

The combination with a level-body liaving a circular hole in its longitudinal enter throughout its thickness, 'from its top edge to its bottoni edge, @if an annular transparent tube containing a fluid-and an air bubble formed therein, said tube itting into a concave groove formed in the inner edges of said circular slot'. a disk shaped ineinber provided with graduations on both sides sent-lisas,

ies

SQ y '1,153,012

filling out the space encompassed by' sald annular tube, brackets connecting s'aid diskshaped member to said level-body so as to maintain all the said elements securely in 5 position and metal plates having ovalslots formed in their longitudinal centers secured on the top and bottom edges of said level body, substantially as and for the purpose set forth.

JOHN BARTHA.

lVitnesses:

JOSEPH TA'HERSALL, Jr., H. A. BEGHER. 

